Even if it's not under warranty, you should still check out SWR's website and have an authorized servicer look at it. My WM10 had a problem and I had to do just that. I am not sorry now, since it works fine. This is probably the only drawback to the entire WM series; it is built to a pricepoint, as opposed to being built like a tank, like their professional series.

One thing I was doing was to chain 2 amps.
I used the SEND from an other amp and I pluged it
in the in of the WM12. Was this a wrong thing to do?
It seems to work well!
Also is it bad to run an amp without the speaker pluged in?
Thanks.

Originally posted by guitaron One thing I was doing was to chain 2 amps.
I used the SEND from an other amp and I pluged it
in the in of the WM12. Was this a wrong thing to do?
It seems to work well!
Also is it bad to run an amp without the speaker pluged in?
Thanks.

I'd wager that the "chaining" was indeed the culprit, especially if you had it going into the "passive" input on the WM. A "Y" cord or BOSS multiple jack (J44) should be the way to go on that...or use the stereo feature on any FX that you may be using.